Yes, I am into minkenry. Plus I have enjoyed having laying hens for many years. And yes, I found your post by searching for "minkenry" out of curiosity one day last week. The book is worth it. Joseph's early videos teach you a lot, however, the book provides more details and is an invaluable resource in getting started. Put is on your all your wish lists.

Go to your public library and ask if they will put it on their purchase list for the library.
I should be getting my first mink in about 5-6 weeks from Joseph. I have had the privilege to spend time helping him with his mink and going on hunting and pest control excursions.
This weekend we ground up mink food and bonded with the new baby mink. We also went on a rat clean up trip at a feed lot and caught over 60 rats with his dog and a couple of the working mink. We also did a rate abatement at my coop last weekend. Watch for the videos posted by Joseph.
Keep trying with your mink trap. Is that a homemade trap? How well does it work. I would recommend that you set it near some small streams or ponds. You will have more success where they are commonly found, rather that were you may have randomly seen tracks. Keep it baited with fresh bait. You don't need a whole fish, just bits that are fresh. Mink steal from each other all the time and will take fresh tidbits left from another mink. Keep part in the freezer and bait your trap every few days. You may even want to leave some bait outside the trap to entice them.
Just remember, this is the kit season and if you catch a female, the kits will be helpless, so release her right away. Try and catch a male at this time of year. by the end of May and the middle of June it really wouldn't matter what gender you caught, you may even be lucky enough to catch a young one.
Keep us posted on your adventure.
Matthew